CHEM 1211L PRINCIPLES OF CHEMISTRY I LAB

MIDTERM EXAMINATION

TAKE HOME PART

Name:

Date:

Last 4 digits of your ABAC ID:

1. Enter the following data in a spreadsheet and use the data to make a graph. The graph must show similar characteristics as the model that you can access through the link labeled “Density vs Percentage Graph”. In order to make reading the scales on the graph easier, make sure that you show minor tick marks on the axes. Note that the graph in the model is drawn using a different data set from the one that you are handed. The axes ranges should show no “dead space”, i.e. the graph should cover all available space.

H2SO4 Percentage	Density
15	1.103
16	1.1064
17	1.1148
18	1.1273
19	1.1338
20	1.1384
21	1.1491
22	1.1558
23	1.1616
24	1.1744
25	1.1793
26	1.1832
27	1.1922
28	1.2013

2. Determine GRAPHICALLY the concentration (in terms of percentage of H2SO4) of a solution of H2SO4 with a density of 1.1ABC, where A, B, and C are the 3 last non-zero digits in your ABAC ID. Draw on the graph the lines that show how you reach your answer. 80% of the grade will be reserved for the graphical details on how you find the concentration. Calculations will not be accepted.

Notes:

* Turn in both the instruction sheet, the graph and the table, separately.

* Your grade on this assignment will be zero if:

• You work with any other numbers than the ones you are assigned
• There is evidence that you are involved in cheating, either as the source or the beneficiary.

* An example of the expected graph is provided. Be aware that the data used to make that graph are not the same as the ones you are given to work on.

Your work is due on the day you take your mid term exam.

Good luck.